Welcome to the forum. Check out this thread for oil change information:
https://www.ecodieselram.com/forum/threads/ram-ecodiesel-oil-change-information.318/
I love it.. it's similar to the EcoDiesel as far as power I feel like, but it for sure a more reliable motor at this point. The reported issues so far are pretty minor electrical gremlins.
I'm averaging 26 MPG overall.. very similar to the EcoDiesel. Some 2wd drives do better (I'm 4x4), and if...
Welcome. It seems like electrical for sure. Can you check all grounds and make sure nothing is off? Double check all connections to/from the ECM? Any work recently? Batteries testing good?
Welcome. It sounds like the Banks system is derating the power, likely a built in safety feature. Have you contacted banks to see if they can shed some light for you?
Welcome! Sounds like you take care of the truck.. I might suggest reading this section for some more tuning options.
https://www.ecodieselram.com/forum/forums/ecodiesel-performance.28/